Consistently use LoFi for an entire page

components/data_reduction_proxy/core/browser/data_reduction_proxy_request_options.cc

Index: components/data_reduction_proxy/core/browser/data_reduction_proxy_request_options.cc
diff --git a/components/data_reduction_proxy/core/browser/data_reduction_proxy_request_options.cc b/components/data_reduction_proxy/core/browser/data_reduction_proxy_request_options.cc
index 24be61b0998bdf0d2ccf1d351a23bc011451d626..55ebdc803a65da3c50fd890f2339de26524a0201 100644
--- a/components/data_reduction_proxy/core/browser/data_reduction_proxy_request_options.cc
+++ b/components/data_reduction_proxy/core/browser/data_reduction_proxy_request_options.cc
@@ -8,6 +8,7 @@
 
 #include "base/bind.h"
 #include "base/command_line.h"
+#include "base/metrics/field_trial.h"
 #include "base/single_thread_task_runner.h"
 #include "base/strings/string_split.h"
 #include "base/strings/string_tokenizer.h"
@@ -161,13 +162,11 @@ void DataReductionProxyRequestOptions::UpdateVersion() {
 void DataReductionProxyRequestOptions::MayRegenerateHeaderBasedOnLoFi(
     const net::URLRequest* request) {
   DCHECK(thread_checker_.CalledOnValidThread());
+  DCHECK(!request || !(request->lofi_state() == net::LOFI_DEFAULT));
 
-  if (!data_reduction_proxy_config_)
-    return;
-
-  bool lofi_now_enabled =
-      !(request && request->load_flags() & net::LOAD_BYPASS_CACHE) &&
-      data_reduction_proxy_config_->ShouldUseLoFiHeaderForRequests();
+  bool lofi_now_enabled = request && request->lofi_state() == net::LOFI_ON &&
+                          !(base::FieldTrialList::FindFullName(
+                                params::GetLoFiFieldTrialName()) == "Control");
 
   // Lo-Fi was not enabled, but now is. Add the header option.
   if (lofi_.empty() && lofi_now_enabled) {